Improve store performance

**Description**
Currently controllers lacks proper import support.

**Proposed solution**
Add configurable import with sensible defaults.

**Priority**: Low/Medium

Start by locating the controllers and the code responsible for importing or loading them; the issue does not name specific files or tests. Determine how configurable imports should work and what sensible defaults mean, then verify that controllers can be imported with and without explicit configuration.

Written by the indexing model from the issue text.